Gaffer MCP Server: Install & Setup

Install Gaffer in Claude Code

Claude Code

claude mcp add gaffer -e GAFFER_API_KEY=... -- npx -y @gaffer-sh/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "gaffer": {
      "command": "npx",
      "args": [
        "-y",
        "@gaffer-sh/mcp"
      ],
      "env": {
        "GAFFER_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Gaffer MCP server do?

Test analytics for AI agents: test history, flaky tests, failure clusters, coverage.

Is the Gaffer MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Gaffer run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Gaffer to Claude Code?

Run: claude mcp add gaffer -e GAFFER_API_KEY=... -- npx -y @gaffer-sh/mcp

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